Global research and development trends in energy storage technologies
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On January 19, the World Energy Agency stated that due to new solar cell technologies and other technological advancements that drive down prices, the cost of battery storage is set to fall by 70% over the next 15 years. With rapid cost reductions, the energy storage industry is entering a period of rapid growth, offering vast market prospects in the future. Grid-scale energy storage will make the variable supply of renewable energy more flexible, and enable rapid addition of energy to the grid during peak electricity demand. Currently, high-cost battery systems prevent power plant operators from deploying energy storage systems on a commercial scale. However, as production increases, the costs of some energy storage technologies will decline. Recently, a collaboration between the University of Southampton in the UK and REAP Systems led to the discovery of a new type of lithium battery that can be used as an energy storage device in photovoltaic systems. This battery achieves an energy storage efficiency of 95%, which can significantly reduce the costs associated with solar power generation. Most current photovoltaic systems still use lead-acid batteries as energy storage devices. However, in comparison, lithium iron phosphate batteries can fully leverage their advantages, including improved energy storage efficiency, longer service life, and lower unit costs. Used as an energy storage device, this type of lithium battery can achieve an energy efficiency of 95%, which is far higher than the 80% of traditional lead-acid batteries, and it has a service life of 1600 charge-discharge cycles.
Although the batteries still require further testing before being used in commercial photovoltaic power generation systems. However, studies have shown that LiFePO4 batteries hold promise for improving the efficiency of solar power systems and helping to reduce their installation and maintenance costs. Compared to traditional lead-acid batteries, LiFePO4 batteries offer higher efficiency, a longer lifespan, lower weight, and lower costs. Energy storage is a key component in realizing the energy internet. In the future, various power generation and consumption sources such as charging facilities, photovoltaic systems, and wind turbines will be connected to the power grid on a large scale. The use of energy storage can help mitigate the fluctuations in distributed power generation and reduce the impact on the power grid. At the same time, electricity reform will accelerate the activation of the user side, and the functions of energy storage such as peak shaving and valley filling will become apparent. At the current stage, the large price difference between peak and off-peak electricity rates in some areas will also promote the development of energy storage, directly reducing the electricity costs for industrial users and bringing economic benefits. The energy storage industry is in a period of rapid growth, and the characteristics of lithium-ion battery storage align well with the specific needs of energy storage for distributed photovoltaic systems and communication base stations. As the price of photovoltaic cells continues to drop and installation volumes keep rising, the demand for energy storage systems is also increasing rapidly. This year, Tesla’s lithium-ion energy storage products, namely the “Power Pack” and the “Power Wall,” have become iconic solutions for energy storage in distributed photovoltaic systems. The trend toward miniaturization and integration of communication base stations has become the main driving force behind the use of lithium batteries as backup power for such stations. As the application of lithium-ion battery energy storage expands, manufacturers at home and abroad are increasingly entering this field. Several large-scale projects at the end of 2015 indicated that the storage industry was shifting from research, development, and demonstration projects to those with commercial viability. According to IHS Technology’s energy storage projects and Company Database, approximately 900 MW of battery-based projects connected to the grid are expected to come online in 2016, and the market for grid-connected energy storage is set to double that year. The energy storage market planned in the United States will account for nearly half of the total projected capacity (about 45%), while Japan’s share will be 20%.
Is there any existing process technology for LiFePO4 batteries in China?